Sound-box for sound recording and reproducing machines.



5N0. 805,964. PATENTED NOV. 28, 1905.

' J. JETTER. SOUND BOX FOR SOUND RECORDING AND REPRODUGING MACHINES.

APPLICATION FILED OCT. 3. 1904.

it a w UNITED STATES PATENT OFFICE.

JULIUS JETTER, OF CAMDEN, NEW JERSEY, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO NONP-ARE IL MACHINE MANUFACTURING COMPANY, OF CAMDEN, NEW JERSEY, ACORPORATION OF NEW JERSEY.

SOUND-BOX FOR SOUND RECORDING AND R EPRODUCING MACHINES.

Specification of'Letters Patent.

Patented. Nov. 28, 1905.

Application filed October 1, 1904:. Serial No. 226,850.

To all whom it may concern;

Be it known that I, JULIUS J ETTER, acitizen of the United States, and a resident of Camden, New Jersey, have invented certain Improvements in Sound-Boxes for Sound Recording and Reproducing Machines, of which the following is a Specification.

My invention consists of certain improvements in connection with the sound-box of graphophones or phonographs or other sound recording and reproducing machines, more commonly known as talking machines, the object of my invention being to improve the character of sound produced by an improved arrangement of certain details of construction of the sound-box, the stylus-lever and its mounting, and the manner of mounting the diaphragm.

My invention is fully shown in the accompanying drawings, in which Figure 1 is a front elevation of a sound-box made in accordance with my invention. Fig.

2 is a sectional View of the same, taken on the line a a, Fig. 1. Fig. 3 is an elevation of the box, showing the stylus-carrying mechanism; and Figs. 4 and 5 are enlarged sectional views of part of Fig. 2. a

In the drawings, 1 represents one part, substantially an annular ring, and 2 the other part, substantially a cap-piece, of the soundboX of a sound recording and reproducing machine. The cap-piece has a flange 3, fitting into said annular ring, which is constructed to receive it, the two parts being held together by screws 4. The annular ring is provided with an internal annular groove or recess 5 (clearly shown in Fig. 4) for a purpose to be described. The parts 1 and 2 are beveled at 6 and 7, respectively, such beveled portions flaring outwardly from the groove or recess 5 when the parts are fitted together.

'A tubular extension 8 may be provided 'to which the usual horn may be attached, and this extension may be screwed into the part 2 of. the sound-box casing and held bymeans of a lock-nut 9 or applied in any other suitable manner.

The diaphragm of the sound-box is indicated at 10, and this is substantially equal in diameter .to the interior of the annular ring 1. In mounting this diaphragm I provide an insulating-washer 11, which engages the edge of the same, andthereby prevents contact of said diaphragm with any portion of the sound-box casing. The washer may be of any suitable materialand may comprise simply a tube of suflicient length to encircle the diaphragm and split, so as to engage the edge of the same. This washer when in place fits and is relatively retained by the annular groove or recess 5 of the'ring 1, as clearly shown in Fig.

4c. The diaphragm is held in place by the contact of the flange 3,-carried by the cappiece 2, said flange engaging the washer in line with the peripheral edge ofthe d iaphragm,

the latter being thereby positively confined against lateral movement and thoroughly insulated from the metal of the sound-box.

The stylus-lever is indicated at 15V and is connected to a plate 16, secured to the periphery of theannular ring 1, the latter being flattened at 17 for the purpose. Thestyluslever is bent, as shown, and its. portion 18 1s.

. connected to the plate 16 by means of a spring 19, having ends.'20, which are confined by screws 21, the central portion of said spring being secured to the extension 180i the stylus-lever by means of a screw 22. The spring may be of any character desired; but I have shown one having curved extensions engaged by the screws 21. This portion 18 of the stylus-lever is fulcrumed in line with the diaphragm, its under surface being grooved at 23 for the engagement of the points 24, carried by the plate 16. By alternately tightening and loosening the screws 21 the tension of the stylus-lever with respect to the diaphragm may be regulated as desired. The opposite stem '31, receiving the stylus-point, is split at 3'3, and as the clamping member 32 is screwed over the same after the stylus-point has been inserted the parts of the stem are pressed together, holding said stylus-point firmly in place.

It will be noticed. that the washer I have provided embraces the edge of the diaphragm,

so that there is no danger of the latter coming in contact with the metal of the sound box. The means I provide for retaining such diaphragm engage said washer in line with the peripheral edge of the diaphragm, leaving the greater part of the washer free, and I bevel the meeting parts of the sound-box adjacent to the washer. By this means the diaphragm is retained firmly in place; but its movements due to the vibration of the styluslever are freer, as the washer may give laterally, its greater part being unconfined by the sound-box.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. A. sound-box for sound recording and reproducing machines, comprising a ring having an internal annular groove or recess, a cap-piece fitting said ring and secured thereto, a diaphragm held between said ring and cap-piece, and a washer for the peripheral edge of said diaphragm, the outer edge of said washer being disposed in the annular groove or recess of the ring.

2. In a sound-box for sound recording and reproducing machines, the combination with a ring and a cap-piece forming the sound-box, the former having an internal annular groove or recess, of a diaphragm, and a washer embracing the edge of' said diaphragm, said washer having a portion fitting the internal annular groove or recess.

3. In a sound-box for sound recording and reproducing machines, the combination of a ring forming one portion of the box, said ring having an internal annular groove or recess, a cap-piece forming the other portion of the box, a diaphragm held between said members,

a washer embracing the edge of said dia-' phragm, and aflange carried by the cap-piece and arranged to engage said washer in line with the peripheral edge of the diaphragm, the outer edge of said washer fitting said internal annular groove or recess.

4. A sound-box for sound recording and reproducing machines, comprising a ring having an internal annular recess, said member being beveled outwardly from said recess, a cap-piece fitting said ring and secured thereto, said cap-piece having a beveled engaging rim, a diaphragm held between said parts, and a washer for said diaphragm, also confined between said parts and extending into the internal annular recess of the ring.

5. In a sound-box for sound recording and reproducing machines, the combination of a ring forming one portion of the box and having an internal annular recess, a cap-piece forming the other portion of the box and fitting said ring, a diaphragm held between said members, the latter being beveled outwardly from said diaphragm, an insulating-washer embracing the edge of said diaphragm, said washer having its outer portion disposed withinthe internal annular recess of the ring, and

a flange carried by the cap-piece and arranged to engage said washer in line with the peripheral edge of the diaphragm.

6. In a sound-box for sound recording and reproducing machines, the combination of a ring forming one portion of the box and having an internal annular groove, a cap-piece forming the other member of the box and having a beveled flange fitting said ring, a diaphragm confined between said parts, and a washer embracing the edge of said diaphragm and adapted to rest in the groove of the ring, the flange of the cap-piece engaging said washer in line with the peripheral edge of the diaphragm.

7. In a sound-box for sound recording and reproducing machines, the combination of a ring forming one member-of the box and having an internal annular groove or recess, a cap-piece forming the other member of the box and having a flange fitting said ring, a diaphragm confined between said parts, and a washer embracing the edge of said diaphragm, the outer edge of which washer rests in the annular groove of the ring, the flange of the cap-piece engaging said washer in line with the periphery of the diaphragm, and said flange and ring being beveled or flared outwardly from the annular groove or recess to permit movement of the washer due to the undulations or vibrations of the diaphragm.

8. In a sound-box for sound recording and reproducing machines, the combination of a ring forming one member of the box and having an internal annular groove or recess, a cap-piece forming the other member of the box and having a flange fitting said annular ring, a diaphragm confined between said parts, a washer embracing the edge of said diaphragm, the outer edge of which washer rests in the annular groove of the ring, the flange of the cap-piece engaging said washer in line with the periphery of the diaphragm, and said flange and ring being beveled or flared outwardly from the annular groove or recess to permit movement of the washer due to the undulations or vibrations of the diaphragm, a stylus-lever connected to the outer surface of the box at one end and to the diaphragm at the other, pivot-points mounted on the casing in line with the diaphragm and engaging the stylus lever, and an adjustable spring arranged between the stylus-lever and the easing whereby said lever may be rocked on said points to increase or diminish the tension on the diaphragm.

9. In a sound-box for sound recording and reproducing machines, the combination of the box proper, a stylus-lever connected thereto, a diaphragm, said stylus-lever having an integral bent and threaded end passed through the diaphragm, and nuts engaging said threaded end and disposed on both faces of the diaphragm to lock the stylus-lever thereto.

10. In a sound-box for sound recording and reproducing-machines, the combination of a ring having an inner beveledsurface, a cap piece having an inner beveled surface, and a diaphragmconfined between said parts, said .diaphragm being confined at its periphery adjacent to said beveled portions, the latter persaid diaphragm held by said parts, the beveled portions of the members composing the box being so disposed as to permit expansion of the washer due to the undulations or vibrations of the diaphragm, and the outer edge of said washer fitting within the internal annular groove or recess of the sound-box.

In testimony whereof I have signed my'name to this specification in the presence of two subscribing witnesses.

' JULIUS J ETTER.

Witnesses:

MURRAY C. BOYER, Jos."H.- KLEIn. 

